Osceola County, Iowa GenealogyEdit This Page
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1851--Osceola County was created 15 January 1851 from unorganized territory. It was attached to Woodbury County prior to organization 1 January 1872. County seat: Sibley 
- History of Osceola County, Iowa: From its Organization to the Present Time
by D.A.W. Perkins
Brown and Saenger, 1892